原子经济反应:氢氧化铯催化下二硒醚与端炔反应合成炔硒醚

氢氧化铯是无机超强碱，它能夺去端炔上的氢而产生稳定炔负离子，这种炔负离子与亲电的酮、醛反应生成相应的炔醇，但是与亲电的杂原子反应形成碳杂键的研究尚未见报道，碳杂键的形成是合成杂原子有机化合物的主要途径，所以研究无机超强碱催化下的碳杂键形成反应，有可能开辟-个合成杂原子有机化合物的新领域，不论在理论上还是在应用上都具有重要意义。

Atom-economic Reaction: Diselenides Reacted with Terminal Alkynes to Synthesize Alkynyl Selenides Catalyzed by Cesium Hydroxy and Promoted by Air

Under N2 atmosphere and at room temperature, the reaction of diaryl diselenid(1.0 mmol) with terminal alkynes(2.2 mmol) catalyzed by cesium hydroxy gave exclusively (Z)-1,2-bis(arylseleno)-1-alkenes, but under air and at -100 ℃, the reaction gave alkyne selenides in 83%95% yields based on the selenium atoms. The method for the preparation of alkyne selenides has advantages of available starting materials and simple procedures. The reaction mechanism was proposed.